97 lines
2.5 KiB
C#
97 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using AutomaticApp.Model;
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using LiveCharts;
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using LiveCharts.Defaults;
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using LiveCharts.Wpf;
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using MySql.Data.MySqlClient;
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namespace AutomaticApp.DataAccess
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{
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//用于对数据库的操作
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public class LocalDataAccess
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{
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private static LocalDataAccess instance;
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public LocalDataAccess() { }
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public static LocalDataAccess GetInstance()
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{
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return instance ?? (instance = new LocalDataAccess());
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}
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List<CourseSeriesModel> cModelList = new List<CourseSeriesModel>();
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//创建数据库相关的连接变量
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MySqlConnection conn;
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MySqlCommand comm;
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MySqlDataAdapter adapter;
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//统一的数据库操作完成的结束方法
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private void Dispose()
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{
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if (adapter != null)
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{
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adapter.Dispose();
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adapter = null;
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}
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if (comm != null)
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{
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comm.Dispose();
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comm = null;
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}
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if (conn != null)
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{
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conn.Close();
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conn.Dispose();
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conn = null;
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}
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}
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//统一的全局数据库连接
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private bool DBConnection()
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{
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//从资源文件中获取名字为“db”的数据库连接信息
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string connStr = ConfigurationManager.ConnectionStrings["db"].ToString();
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if (conn == null)
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conn = new MySqlConnection(connStr);
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try
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{
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conn.Open();
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return true;
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}
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catch (Exception)
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{
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return false;
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}
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}
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public void write(string sql)
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{
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if (DBConnection())
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{
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MySqlCommand t1 = new MySqlCommand(sql, conn);
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try
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{
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if (t1.ExecuteNonQuery() > 0)
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{
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// Console.WriteLine("数据插入成功了！");
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}
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}
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catch (Exception err)
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{
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Console.WriteLine(err.Message);
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}
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finally
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{
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this.Dispose();
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}
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}
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}
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}
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}
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